Guillotines adapted for use in splitting shakes



G. BROWN Match 15, 1955 GUILLOTINES ADAPTED FOR USE IN SPLITTING SHAKESFiled Jan. 20, 1954 Q g A INVENTOR GORDON BROWN flay/(2M.

A TTORNE Y United States Patent GUILLOTINES ADAPTED FOR USE IN SPLITTING SHAKES Gordon Brown, Haney, British Columbia, Canada, assignor toPacific Shake & Shingle Company, New Westminster, British Columbia,Canada Application January 20, 1954, Serial No. 405,198

2 Claims. (Cl. 144193) My invention relates to improvements inguillotines adapted for use in splitting shakes from blocks.

The object of the present device is to provide means whereby the knifeor frow used is not required to travel deeply into the end grain of theblock in order to clearly split a shake blank therefrom, and to providemeans for exerting a splitting force to the blank which will cause thesplit to travel rapidly in advance of the knife whereby only a shortlength of the vertical surface of the block and the blank shall besmoothed by the cutting edge of the knife, thereby leaving the face ofthe shake blank naturally fluted or corrugated transversely of the grainas it is popularly termed in the trade. A further object is to provide aresilient gauge against which the block may be thrust to insure thateach shake blank may be split to a standard thickness at its upper end,and to provide means for removing the gauge from the work as soon as theblank is severed from the block, to allow it to be carried to dischargeor for conveyance to other processing machines. Other objects willappear as the specification proceeds.

Referring to the accompanying drawings:

Figure l is a rear elevation of the device showing a block carried onthe bed and engaging the thickness gauge with the guillotine knife atthe top of its stroke.

Figure 2 is an enlarged side elevational view showing the operatingmovement of the thickness gauge.

Figure 3 is an enlarged sectional view taken on the line 3-3 of Figure1, showing the operation of the flipper plate.

Figure 4 is an elevational view of the thickness gauge scale and itssetting mechanism.

Figure 5 is a diagrammatic view showing the movements of the flipperplate and the gauge plate during the downward stroke of the knife.

Figure 6 is a sectional plan view taken on the line 6--6 of Figure 1.

In the drawings like characters of reference indicate correspondingparts in each figure.

The numeral 1 indicates a frame having vertical legs 2 of channelsection which are connected at their upper ends by a head 3 and whichsupport between them an anvil or bed 4.

The legs 2 are provided on their inner sides with a slot 6, see Figure6, in which a guillotine knife 8 is slidably mounted. The knife 8 isprovided with extended vertical side pieces 9, both of which extendthrough the slots 6 and are received in guides 10 supported in the legs2. An inverted V-shaped member 11 is formed 1ntegrally with the knifeand to this a hydraulic ram 12 is connected to reciprocate the knife 8.The knife travel is relatively short, preferably about one-third of themaximum length of block split upon the bed 4 and a pair of heavy tensionsprings 14 are provided to expedite 1ts return or upward movement.

The knife blade 8 is bevelled as shown in Figures 2 3 and 5 to provide acutting and splitting edge and on its rear side, see Figure 3, and arectangular recess 16 1s formed to receive the lower end of a flipperplate 17. The flipper plate 17 is rectangular in form and is carried bya horizontal shaft 18 which is mounted in bearings 19 carried on theback of the knife. The shaft 18 is provided at one end with a light arm21 which extends diagonally across one of the side pieces 9 of the knifeand is connected at its free end by a tension spring 23 anchored to theadjacent side piece 9 of the knife. An operating crank 25 is connectedto the shaft 18 to move 2,704,093 Patented Mar. 15, 1955 ice the flipperplate outwardly to split and separate a shake blank from the block as itreaches the end of its downward stroke. This crank is fitted at its freeend with a roller 26 which projects rearwardly of the frame 1 at allpoints of its operation. The crank roller is adapted to engage, duringthe downward movement of the knife, a substantially half roundprotuberance 27 mounted upon an angle member 28 to swing out the flipperplate 17 smartly as the knife 8 approaches the end of its stroke. Theangle member 28 is slotted as at 29 and is adjustably secured by bolts30 to a member 31 projecting from an adjacent leg 2. If the wood beingused splits easily, then the angle member is adjusted closer to theframe 1, so that the shakes will split otf early in the downward knifestroke and the knife may be returned at shorter intervals and greateroutput obtained.

Extending transversely across the frame 1 is a horizontal shaft 34 whichis carried in bearings 35 and 36, adjacent the bearing 35 a U-shapedpiece of metal is inserted to form a crank member 37 in the shaft. Thiscrank member is in the path of the operating crank 25 and is provided sothat the operating crank 25 may pass freely across the axis of the shaft34 and through said crank member as the knife 8 is reciprocated, seeFigure 3. Secured to and depending from the shaft 34 is a gauge plate 38which normally lies across the path of a block upon the bed 4. The shaft34 is fitted with a lever 39 which normally, or when the machine is atrest, with the knife elevated to admit a block therebeneath, is in ahorizontal position and extends across the leg 2 as in Figure 2. Thelever 39 is resiliently tensioned by a strong spring 40 to hold thegauge plate in adjusted position to gauge the thickness of shake blankit is intended to cut from the block.

Mounted upon the adjacent leg 2 is a graduated scale 42 and mountedthereby is a gauge screw 43 having a knurled head 44. When the thicknessof shake blanks which are desired to be cut is determined, the screw 43is turned to rock the lever 39 and move it to the desired thicknessindicated on the graduated scale, so that the gauge plate will beresiliently held the predetermined distance away from the cutting edgeof the knife.

A lever 46 extends radially from the shaft 34, which lever is fitted atits outer end with a roller 48. The roller is adapted to be engaged by acam track 49 shown in dotted line in Figure 2 and carried on the rearface of the knife adjacent the bearing 36, so that as the knife isforced downwardly by the ram 12 and substantially simultaneously withthe splitting of a shake blank from a block, the gauge plate 35 will beswung rearwardly as shown in the diagram of Figure 5, to allow the cutand split off shake blank to fall to discharge.

What I claim as my invention is:

1. A guillotine for splitting shakes comprising a vertical frame havinga block support, a knife slidably mounted in the frame to engage a blockon the support, means for imparting a downward thrust to the knife, aflipper plate hingedly mounted in bearings carried by the knife adaptedto enter the gap formed by the descending knife in cutting the block,said flipper plate having its free edge normally in contact throughoutits length with the face of the knife, cam means carried by the frame,and means connected with the flipper plate adapted to engage the cammeans to swing the flipper plate rearwardly from the knife and split theblock in advance of the knife cut.

2. A guillotine for splitting shakes comprising a vertical frame havinga block support, a knife slidably mounted in the frame to engage a blockon the support, means for imparting a downward thrust to the knife, aflipper plate hingedly mounted in bearings carri'ed by the knife adaptedto enter the gap formed by the descending knife in cutting the block,and means for swinging said flipper plate rearwardly away from the knifeand splitting the block in advance of the knife cut, a gauge platehingedly mounted transversely of the frame, said plate having its freeedge projecting normally downwardly below the height of a block to besplit and parallel to the knife, means for setting the free edge of saidplate to a desired distance from the knife, and cam means mounted on theknife for swinging the gauge plate upwardly and away from said knife andfrom a 1,407,719 shake split from the block. 2,087,321

References Cited in the file of this patent UNITED STATES PATENTS 5443,581 Marshall Dec. 30, 1890 273,318 451,228 Trevor Apr. 28, 1901 4Boner Feb. 28, 1922 Hilke July 20, 1937 FOREIGN PATENTS Germany June 28,1920 Australia May 17, 1945 Switzerland May 1, 1951

